利用频率分集单脉冲雷达估计多个散射体的质心角度
Centroid Angle Estimation of Multiple Scatterers Using Monopulse Radar with Frequency Diversity
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中文总结 AI 辅助
针对单脉冲雷达难以分辨同一分辨单元内多个紧密间隔散射体的问题，本文提出利用单脉冲角度估计的众数并结合频率分集降低样本相关性，以低复杂度准确估计散射体角度质心，数值实验验证其性能优于传统方法。
中文摘要 AI 辅助
单脉冲技术通过比较两个窄波束的信号来确定目标角度，能够以低复杂度获得精确的角度估计。然而，该方法难以分辨同一分辨单元内多个紧密间隔的散射体。现有的多散射体角度估计方法涉及复杂的信号处理和系统修改。我们提出了一种有效的方法，利用单脉冲角度估计的众数来估计散射体的角度质心。推导了角度估计分布的半解析表达式，证实其众数与质心一致。为提高估计精度，我们采用频率分集来降低样本相关性。数值结果验证了所提方法的优势，表明其性能优于传统技术且复杂度低。
英文摘要
The monopulse technique determines the angle of a target by comparing signals from two narrow beams, yielding a precise angular estimate with low complexity. However, it struggles to resolve multiple closely spaced scatterers within the same resolution cell. Existing methods for estimating multiple scatterer angles involve complex signal processing and system modifications. We propose an effective method to estimate the angular centroid of scatterers using the mode of monopulse angle estimates. A semi-analytic expression for the angle estimate distribution is derived, confirming that its mode aligns with the centroid. To enhance estimation accuracy, we employ frequency diversity to reduce sample correlation. Numerical results validate the advantages of the proposed method, demonstrating superior performance over conventional techniques with low complexity.
发表机构
- The School of Electrical Engineering, Korea Advanced Institute of Science and Technology（韩国科学技术院电气工程学院）
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